# Relationship history for MSHA mine 4703181

Current hierarchy: **Daniel V  Shay; Claudine  Shay → C Shay Trucking Inc → WASHPLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** C Shay Trucking Inc → WASHPLANT; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel V  Shay et al → WASHPLANT; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel V  Shay et al → C Shay Trucking Inc; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Claudine  Shay et al → C Shay Trucking Inc; 1999-03-01 to current/open; source msha-controller-operator-history